These are san marzanos I sowed a little over three weeks ago. Tomato seedlings have a tendency to be purplish, so I've not been concerning myself over it. I was also told not to fertilize until they are at least four weeks old. The soil I'm using has a ratio of .05, .05, .05.
The purple tint is becoming too much in my opinion. Temperatures are consistent from 70G-80F, light is 23,000 lumens at least 12 hours daily, and I water when the top of the soil dries.
I think they've depleted all their phosphorus and will soon start showing worse signs of nutrients deficiency. Should I fertilize?
by SeaworthinessNew4295
2 Comments
At that height, I usually give half strength fertilizer about once a week.
That’s fine it mean they developed a strong roots and ready .